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Why does the old Camry have no idle speed after removing the battery?

2 Answers

OGiselle

08/26/25 3:59am

The idle speed of the engine is controlled by an electromagnetic valve, and insufficient power will definitely have some impact. Here are some details about car batteries: 1. Function: The car battery, also known as a storage battery, is a type of battery that plays a very important role in the operation of a car. If the car battery cannot supply power normally, the engine will encounter problems. Car owners should regularly check the battery—once a week in summer and once every two weeks in winter. 2. Factors affecting battery life: vehicle condition, road conditions, and driving habits; good driving habits can extend the battery's lifespan.

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RowanLynn

09/08/25 4:57am

I've encountered this issue too. Anyone who's driven an older Camry knows that once the battery is disconnected, the idle speed tends to disappear. This is mainly because the engine control unit loses its previous settings after a reboot and needs to relearn them. Back when I was fixing cars, I tried starting the engine and letting it idle in neutral for about ten minutes without moving, allowing the computer to gradually adapt. If that doesn't work, you might need to check the idle control valve or the mass airflow sensor, as these parts tend to accumulate dust and get stuck in older cars. It's advisable to avoid disconnecting the battery frequently and to clean related components regularly as a preventive measure. After all, unstable idle speed can affect starting and smoothness, and if not addressed promptly, it may also lead to increased fuel consumption.

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